At the start of the Damage Step, if this card battles an opponent's monster: You can destroy that monster
The Moxen were not interesting for a 10 year old (fancy lands), neither was Timetwister (an expensive Wheel of Fortune), or Ancestral Recall (card draw was very meh), but Time Walk seemed like the most amazing card ever printed
Play Rule #13 states: Abilities which refer to other cards owned outside the game (Wishes, Spawnsire, Research, Ring of Ma'ruf) do not function in Commander without prior agreement on their scope from the playgroup. Therefore, Spike is twice banned in Commander, and even if Unstable were allowed, Spike wouldnt be able to be played
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